Boleto is one the most popular ways to pay bills in Brazil. Banks, companies and people use it for a long time. Basically it is a barcode that you can pay at banks, lottery agents, supermarkets and many retail stores in Brazil. You can also buy online at your e-bank, by phone or at any brazilian ATM. The payment is credited in one business day and there is no chargeback. Payments made in cash have complete privacy to the btc buyer.
This improvement has the potential to increase the BRL/BTC market size exponentially. That is why I created this proposal: https://github.com/bisq-network/growth/issues/199